I can't seem to figure out how to turn off IK and use FK only on my hand controls (during auto-rig) in the latest version of 16.0.5. There used to be FK attributes on the controllers before, what am I missing?

There are still some FK controls (with a few more options) in the effects of the controllers: just disable the IK, it will be using FK, and the FK controls are in a group behind called FK/Individual controls